KR100467274B1 - EL key pad using color layer and method for fabricating the same - Google Patents

Abstract

PURPOSE: An electroluminescent keypad and a method are provided to maintain a gray color tone when a light emitting element is not turned on, and reproduce color tones other than the gray color tone when the light emitting element is turned on. CONSTITUTION: An electroluminescent keypad comprises a light emitting element(10) for a backlight; a color layer(120) formed on a front surface of the light emitting element; a primer layer(110) formed at a rear surface of the light emitting element; a material layer(140) formed integrally with the light emitting element through the primer layer, wherein the material layer forms a protrusion(145); and a plurality of keys(150) attached to the color layer in correspondence to a light emitting surface of the front surface of the light emitting element.

Description

Integrated EL keypad using color layer and manufacturing method thereof {EL key pad using color layer and method for fabricating the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated EL keypad and a method of manufacturing the same. More particularly, a color layer is used to change the color tone of light emitted from the light emitting element and to be extracted to the outside. The present invention relates to an integrated EL keypad and a method of manufacturing the same, which can implement different color tones during lighting.

The color of the conventional keypad is determined by the color of the EL element used as the light emitting element and the color tone of the key formed on the EL, that is, the type and amount of pigment.

For example, if the EL color is Deep-Blue color (color coordinates X = 0.16, Y = 0.21), the color of the EL keypad is X = 0.16, Y = 0.21 unless any pigment is added to the key. The hue corresponding to the color coordinate is displayed.

However, addition of a small amount of violet pigment changes to a deeper blue tone. For example, when 0.1 g of a violet pigment is added, a color of darker blue tones X = 0.15 and Y = 0.16 can be obtained.

However, when a colored pigment is added to the key, the color tone appears due to the pigment added to the key even when EL is not turned on, although it depends on the amount of the pigment added.

If EL wants a hue of a gray series to emit light when it is unlit and a blue hue to illuminate when EL is lit, a practical method can be realized. Part) has a method of processing gray tones.

However, when the surface of the key is emitted in gray color tone, the transmittance of the light emitted from the EL decreases due to the surface treatment, thereby reducing the luminance of the keypad.

An object of the present invention is to solve the above-mentioned problems of the prior art, the present invention is to maintain the color tone of the gray-based when the light-emitting device is unlit using a color layer, the color of the light (light) when the light-emitting device An object of the present invention is to provide an integrated EL keypad that implements color tone.

1 is a flowchart showing a process sequence for manufacturing the integrated EL keypad according to the first embodiment of the present invention.

2A to 2F are cross sectional views for explaining a method for manufacturing the integrated EL keypad according to the first embodiment of the present invention shown in FIG.

Fig. 3 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad used in the portable terminal according to the second embodiment of the present invention.

4 is a cross-sectional view for explaining a keyed integrated EL keypad according to a second embodiment of the present invention manufactured in accordance with the manufacturing process shown in FIG.

Fig. 5 is a flowchart showing the process sequence for manufacturing the integrated EL keypad according to the third embodiment of the present invention.

6A to 6E are cross-sectional views for explaining the method for manufacturing the integrated EL keypad according to the third embodiment of the present invention shown in FIG.

Fig. 7 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad for use in the portable terminal according to the fourth embodiment of the present invention.

FIG. 8 is a sectional view for explaining a keyed integrated EL keypad according to a fourth embodiment of the present invention manufactured in accordance with the manufacturing process shown in FIG.

Fig. 9 is a flowchart showing the process sequence for manufacturing the integrated EL keypad according to the fifth embodiment of the present invention.

Fig. 10 is a sectional view showing an integrated EL keypad according to the fifth embodiment of the present invention.

Fig. 11 is a flowchart showing the procedure of manufacturing a keyed integrated EL keypad for use in the portable terminal according to the sixth embodiment of the present invention.

Fig. 12 is a sectional view for explaining a keyed integrated EL keypad according to a sixth embodiment of the present invention manufactured in accordance with the manufacturing process shown in Fig. 11;

Figure 13 illustrates an example of a keypad made according to an embodiment of the present invention.

The present invention for achieving the above object is a light emitting device for backlight; A color layer formed on the front surface of the light emitting device; A primer layer formed on the rear surface of the light emitting device; A material layer integrated with the light emitting device through a primer layer on a rear surface of the light emitting device; An integrated EL keypad having a plurality of keys attached to a color layer corresponding to a light emitting surface of the front surface of the light emitting element is provided.

The present invention also provides a light emitting device for backlight; A color layer formed on the front surface of the light emitting device; A material layer integrated with the light emitting device through the color layer and for attaching a key; A material layer integrated with the light emitting device through a rear surface of the light emitting device; An integrated EL keypad comprising a plurality of keys attached to a material layer for attaching keys corresponding to a light emitting surface of the front surface of the light emitting element is provided.

The present invention also provides a light emitting device for backlight; A color layer formed on the front surface of the light emitting device; A first primer layer formed on the color layer; A material layer integrated with the light emitting device through the first primer layer and attaching a key; A second primer layer formed on the rear surface of the light emitting device; A material layer integrated with the light emitting device through the second primer layer; An integrated EL keypad comprising a plurality of keys attached to a material layer for attaching keys corresponding to a light emitting surface of the front surface of the light emitting element is provided.

The light emitting element is preferably made up of a plurality of EL elements arranged in correspondence with the respective keys with spaces therebetween maintaining a certain distance from each other in consideration of the click feeling of the integrated EL keypad. Further, it is preferable that the color layer is formed on the entire surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm.

In addition, the present invention provides a method of manufacturing an integrated EL keypad for use in a portable terminal, comprising the steps of: manufacturing a light emitting element for a backlight; Forming a color layer on the entire surface of the light emitting device; Forming a primer layer on a rear surface of the light emitting device; Integrating the light emitting device through a material layer for forming the protrusion and a primer layer on the rear surface of the light emitting device; Cutting the light emitting device and the material layer integrated into a form suitable for the portable terminal in consideration of a click feeling; A manufacturing method of an integrated EL keypad comprising a step of attaching a plurality of keys to a color layer corresponding to a light emitting surface of the front surface of the light emitting element.

In addition, the present invention provides a method of manufacturing an integrated EL keypad for use in a portable terminal, comprising the steps of: manufacturing a light emitting element for a backlight; Forming a color layer on the entire surface of the light emitting device; Integrating a material layer for attaching a key with the light emitting element through the color layer; Integrating a material layer for forming a protrusion with the light emitting device through a rear surface of the light emitting device; Cutting the light emitting element integrated into a form suitable for a portable terminal, a material layer for attaching a key, and a material layer for forming a protrusion in view of a feeling of click; A manufacturing method of an integrated EL keypad comprising a step of attaching a plurality of keys to a color layer corresponding to a light emitting surface in the front surface of the light emitting element.

In addition, the present invention provides a method of manufacturing an integrated EL keypad for use in a portable terminal, comprising the steps of: manufacturing a light emitting element for a backlight; Forming a color layer on the entire surface of the light emitting device; Forming a first primer layer on the color layer; Integrating a material layer for attaching a key with the light emitting element through the first primer layer; Forming a second primer layer on a rear surface of the light emitting device; Integrating a material layer for forming a protrusion with the light emitting device through the second primer layer; Cutting the light emitting element integrated into a form suitable for a portable terminal, a material layer for attaching a key, and a material layer for forming a protrusion in view of a feeling of click; A manufacturing method of an integrated EL keypad comprising a step of attaching a plurality of keys to a color layer corresponding to a light emitting surface in the front surface of the light emitting element.

The light emitting element is composed of a plurality of EL elements arranged corresponding to the key, and after the color layer forming process, a space portion is formed so as to maintain a predetermined interval between the light emitting elements by removing unnecessary portions of the EL element. The cutting process may be further performed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Example 1)

Fig. 1 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad for use in a portable terminal according to the first embodiment of the present invention, and Figs. 2A to 2F are according to the first embodiment of the present invention. It is process cross section for demonstrating the method of manufacturing a keyed integrated EL keypad.

First, referring to FIG. 1, in the integrated EL keypad according to the first embodiment, a process 101 of manufacturing an EL element for a keypad used as a backlight of a keypad, a process of forming a color layer on the front surface of the EL element ( 102), in consideration of the click feeling of the integrated EL keypad, a step 103 of cutting unnecessary portions of the keypad EL element having a color layer formed on its front surface; and a process of forming a primer layer on the back surface of the keypad EL element. (104), a process of forming a silicon layer on the primer layer on the back of the EL element for keypad (105); after forming the silicon, the keypad EL is cut to a size suitable for the case of the portable terminal, taking into account the click feeling of the integrated EL keypad. The process proceeds to the step 106 and the step 107 of attaching the key corresponding to the key position of the case of the portable terminal to produce.

Next, a method of manufacturing the keypad according to the first embodiment according to the process sequence of FIG. 1 will be described with reference to FIGS. 2A to 2F.

Referring to Fig. 2A, first, an EL element 10 used as a backlight is manufactured. That is, a transparent electrode layer 12 made of ITO is formed on a transparent insulating substrate 11 such as a polyethylene terephthalate (PET) film, and a light emitting layer 13 which is a fluorescent layer is formed on the transparent electrode layer 12. An insulating layer 14, which is a dielectric layer, is formed on the light emitting layer 13, and a back electrode layer 15 is formed on the insulating layer 14. Subsequently, the protective layer 16 is formed to surround the emission layer 13, the insulating layer 14, and the back electrode layer 15.

In the EL element 10 having the structure as described above, the transparent electrode layer 12 and the back electrode layer 15 act as two electrodes, and light is emitted from the light emitting layer 13 when power is applied to these electrodes 12 and 15. This emits light.

Referring to FIG. 2B, a color layer 120 is formed on the entire surface of the EL element 10 manufactured by the method as described above. In this case, the color layer 120 may be a material having a color tone, for example, a constant color tone of a blue color. In addition, the color layer 120 is preferably a material that is resistant to moisture penetrating into the transparent insulating substrate 11, more preferably, a polyester-based material. In addition, the color layer 120 preferably has a thickness of 2㎛ 10㎛.

Referring to FIG. 2C, an unnecessary portion of the EL element 10 having a color layer 120 formed thereon is cut, for example, an unnecessary portion except for a light emitting surface and a portion necessary for operation is integrated EL keypad. Cut in consideration of the click feeling. In this case, the space portion 130 formed by the cutting may not only improve a click feeling by improving flexibility between neighboring keys, but also prevent a malfunction due to interference of neighboring keys.

Referring to Fig. 2D, the primer layer 110 is formed on the back of the EL element 10 in which the unnecessary portion is cut. In this case, the primer layer 110 is integrated with the EL element 10 and the EL element 10 formed in a subsequent process, and uses a material having excellent adhesion to a material layer in which protrusions for clicking the dome switch are formed. It is preferable.

Referring to FIG. 2E, an unnecessary portion is cut, the EL element 10 having the primer layer 110 formed on the back thereof is integrated with the EL element 10 through the primer layer 110, and the clicking of the dome switch is performed. The material layer 140 on which the protrusion 145 is formed is formed.

In this case, the material layer 140 is preferably formed by molding silicon or synthetic resin.

In addition, although not shown in the drawing, the protrusion 145 is intended to operate a dome switch in contact with a dome located on a printed circuit board and to improve a feeling of clicking.

Referring to FIG. 2F, in consideration of the click feeling of the integrated EL keypad, the contour of the EL element integrated with the material layer 140 is cut to fit the instrument hole to fix the size of the portable terminal and the size of the integrated EL keypad. Next, a key or 150 printed with letters or numbers is attached to a position corresponding to the key position of the case. As a result, an integrated EL keypad according to the first embodiment of the present invention is manufactured.

(Example 2)

FIG. 3 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad for use in a portable terminal according to a second embodiment of the present invention, and FIG. 4 is a bone manufactured according to the manufacturing process shown in FIG. It is sectional drawing for demonstrating the keyed integrated EL keypad which concerns on 2nd Embodiment of this invention.

The integrated EL keypad according to the second embodiment formed through the process shown in Fig. 3 is formed through a process similar to the first embodiment. However, in the manufacturing process of the first embodiment, it is formed except for the step 103 of cutting unnecessary portions of the EL element for keypad having a color layer formed on the front surface thereof.

That is, in the key type integrated EL keypad used in the portable terminal according to the second embodiment of the present invention shown in FIG. 4, the transparent electrode layer 22, the light emitting layer 23, and the insulating layer ( 24, the color layer 220 is formed on the front surface of the EL element 20 for keypads having the structure in which the back electrode layer 25 and the protective layer 26 are sequentially formed, and then the primer layer 210 is formed on the back surface. The material layer 240 is formed on the primer layer 210 by integrating with the EL element 20 through the primer layer 210 and forming a protrusion 245 for clicking the dome switch.

In this case, as in the first embodiment, the material layer 240 in which the protrusion 245 is formed is preferably formed by molding silicon or synthetic resin.

Then, considering the click feeling of the integrated EL keypad, the outer shape of the EL element integrated with the material layer 240 is cut to fit the instrument hole to fix the size of the portable terminal and the size suitable for the size of the portable terminal. A key 250 in which letters or numbers are printed is attached to a position corresponding to the key position of the case to form the integrated EL keypad according to the second embodiment.

(Example 3)

FIG. 5 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad for use in a portable terminal according to a third embodiment of the present invention, and FIGS. 6A to 6E are drawings of the present invention shown in FIG. It is a process cross section for demonstrating the method of manufacturing the keyed integrated EL keypad according to the third embodiment.

First, referring to FIG. 5, in the keypad according to the third embodiment, a process 301 of manufacturing an EL element used as a backlight of the keypad, a step 302 of forming a color layer on the front surface of the EL element, and A process of forming a silicon layer on the color layer on the front surface of the EL element (303), and a process of cutting unnecessary portions of the EL element for keypads having a color layer and a silicon layer formed on the front surface of the EL element in consideration of the feeling of click of the integrated EL keypad. (304), a step of forming a silicon layer on the back of the EL element (305), a keypad EL element having a silicon layer formed on the back in consideration of the feeling of click of an integrated EL keypad is applied to a mechanism of a mobile phone case and a case of a portable terminal. The process proceeds in the order of the step 306 of cutting to an appropriate size and the step 307 of attaching a key corresponding to the key position of the case of the portable terminal.

Next, a method of manufacturing the keypad according to the third embodiment according to the process sequence of FIG. 5 will be described with reference to FIGS. 6A to 6D.

Referring to Fig. 6A, first, an EL element 30 used as a backlight is manufactured. The EL element 30 used in the second embodiment, like the EL element 10 according to the first embodiment, also has a transparent electrode layer 32, a light emitting layer 33, an insulating layer 34 on the transparent insulating substrate 31. ), The back electrode layer 35 and the protective layer 36 are formed sequentially.

Referring to Fig. 6B, as in the first embodiment, the color layer 320 is formed using a material having a constant tone tone on the entire surface of the EL element.

After the color layer 320 is formed, a material layer 341 is formed on the color layer 320 in front of the EL element through the color layer 320 to be integrated with the EL element and to attach a key. do.

At this time, the material layer 341 for attaching the key is preferably a silicon layer or a synthetic resin layer formed through molding.

Alternatively, the material layer 341 for attaching the key may be a silicone film or a synthetic resin film.

Referring to Fig. 6C, the unnecessary portion of the EL element, in which the color layer 320 and the material layer 341 for attaching the key are formed, is cut in consideration of the click feeling of the integrated EL keypad. At this time, the space portion 330 formed by the cutting also improves the click feeling by improving flexibility between neighboring keys, similar to the space portion 130 of the first embodiment, and prevents malfunction due to interference of neighboring keys. do.

Referring to FIG. 6D, a material layer 342 is formed on the rear surface of the EL element 30 from which the unnecessary portion is cut, integral with the EL element 30, and a protrusion 345 for clicking the dome switch is formed. . In this case, although not shown in the drawing, the protrusion 345 is intended to operate the dome switch in contact with the dome located on the printed circuit board, and to improve the feeling of clicking.

The material layer 340 on which the protrusion 345 is formed is preferably formed by molding silicon or synthetic resin.

Referring to FIG. 6E, an EL element integrated with two material layers 340 of a material layer 342 formed on the back of the EL element 30 and a material layer 341 for attaching a key formed on the front color layer. In consideration of the feeling of click, the key is cut to fit the size of the portable terminal and the size of the integrated EL keypad to fit the instrument hole, and then a letter or number is printed at a position corresponding to the key position of the case. 350). As a result, an integrated EL keypad according to the third embodiment of the present invention is manufactured.

(Example 4)

FIG. 7 is a flowchart showing a process sequence for manufacturing a keyed integrated EL keypad used in a portable terminal according to the fourth embodiment of the present invention, and FIG. 8 is a bone manufactured according to the manufacturing process shown in FIG. It is sectional drawing for demonstrating the keyed integrated EL keypad which concerns on 4th Embodiment of this invention.

The integrated EL keypad according to the fourth embodiment formed through the process shown in Fig. 7 is formed through a process similar to the third embodiment. However, in the manufacturing process of the third embodiment, the only difference is that it is formed except for the step 304 of cutting an unnecessary portion of the EL element for keypad in which a material layer for attaching a key is formed on the front color layer.

That is, in the key type integrated EL keypad used in the portable terminal according to the fourth embodiment of the present invention shown in FIG. 8, the transparent electrode layer 42, the light emitting layer 43, and the insulating layer ( 44, a color layer 420 is formed on the front surface of the keypad EL element 40 having a structure in which the back electrode layer 45 and the protective layer 46 are sequentially formed, and a key is attached on the color layer 420. A material layer 441 is formed.

In this case, like the third embodiment, the material layer 341 for attaching the key is preferably a silicon layer or a synthetic resin layer formed through molding, or a silicon film or a synthetic resin film.

Then, the material layer 442 on which the protrusion 445 is formed is formed on the rear surface of the EL element 40 for the keypad.

Like the first embodiment, the material layer 442 on which the protrusion 445 is formed is preferably made of silicon or synthetic resin.

Then, considering the click feeling of the integrated EL keypad, the external shape of the EL element 40 integrated with the material layer 441 and the material layer 442 on which the protrusions are formed is adapted to the dimensions of the portable terminal. After cutting to fit the instrument hole in order to fix the size and the integrated EL keypad, the integrated EL keypad according to the fourth embodiment is attached by attaching a key 450 in which letters or numbers are printed at a position corresponding to the key position of the case. Form.

(Example 5)

FIG. 9 is a flowchart showing a process procedure for manufacturing a keyed integrated EL keypad for use in a portable terminal according to a fifth embodiment of the present invention, and FIG. 10 is an invention produced according to the process shown in FIG. Is a cross-sectional view of an EL keypad according to a fifth embodiment of the invention.

Referring to Fig. 9, in the keypad according to the fifth embodiment, a process of manufacturing an EL element used as a backlight of the keypad (501), a process of forming a color layer on the front of the EL element (502), and the front of the EL element Forming a first primer layer on the color layer (503), forming a silicon layer on the first primer layer (504), and considering the click feeling of the integrated EL keypad, the color layer on the entire EL element To cut unnecessary portions of the keypad EL element on which the primer layer and the silicon layer are formed (505), to form a second primer layer on the back of the keypad EL element (506), to the back of the EL element for the keypad. Step 507 of forming a silicon layer on the second primer layer, in consideration of the click feeling of the integrated EL keypad, the EL element for the keypad having the silicon layer formed on the back thereof is suitable for the mechanism of the mobile phone case and the case of the portable terminal. It is produced in association with the key position on the case of step 508, and the portable terminal proceeds to cut into a size order of the step (509) for attaching the key.

That is, the keyed integrated EL keypad shown in Fig. 10 is structurally similar to the integrated EL keypad of the third embodiment. However, a primer layer 515 is interposed between the color layer 520 and the silicon layer 541 on the front surface of the EL element 50, and the protective film 56 and the protrusion on the back of the EL element 50 are formed. Only the structure in which the primer layer 510 is interposed between the layers 542 is different.

(Example 6)

FIG. 11 is a flowchart showing a process sequence for manufacturing a keyed integrated EL keypad used in a portable terminal according to the sixth embodiment of the present invention, and FIG. 12 is a bone manufactured according to the manufacturing process shown in FIG. It is sectional drawing for demonstrating the keyed integrated EL keypad which concerns on 6th Embodiment of this invention.

The integrated EL keypad according to the sixth embodiment formed through the process shown in Fig. 11 is formed through a process similar to the fifth embodiment. However, in the manufacturing process of the fifth embodiment, only the structure is formed except for the step 505 of cutting unnecessary portions of the EL element for keypads having a color layer formed on the front surface thereof.

That is, in the key type integrated EL keypad used in the portable terminal according to the sixth embodiment of the present invention shown in FIG. 12, the transparent electrode layer 62, the light emitting layer 63, the insulating layer ( 64, a color layer 620 is formed on the entire surface of the keypad EL element 60 having a structure in which the back electrode layer 65 and the protective layer 66 are sequentially formed, and the primer layer (620) is formed on the color layer 620. After forming 615, a material layer 641 for attaching a key is formed on the primer layer 615.

Then, after forming the primer layer 610 on the back of the EL element 60 for the keypad, a material layer 642 for forming the protrusions on the primer layer 610 is formed.

Then, in consideration of the click feeling of the integrated EL keypad, the external shape of the EL element 60 integrated with the material layer 641 for attaching the key and the material layer 642 for forming the projection is determined in the dimensions of the portable terminal. The integrated EL keypad according to the sixth embodiment is cut by fitting to an instrument hole to fix a proper size and integrated EL keypad, and then attaching a key 650 having letters or numbers printed on the position corresponding to the key position of the case. To form.

FIG. 13 is an example of an integrated EL keypad according to an embodiment of the present invention, showing only some keys of the keypad, and FIGS. 2A to 2D, 4, 6A to 6E, 8, 10, and 12. Is a cross-sectional view corresponding to line II ′ of FIG. 13.

As described above, the integrated EL keypad according to the embodiment of the present invention includes the color layers 120, 220, 320, 420, 520, and 620, whereby the light emitting elements 10, 20, 30, 40, 50, and 60 are provided. The color tone of the light emitting device 10, 20, 30, 40, 50, 60 by the color layer (120, 220, 320, 420, 520, 620) can be changed, When turned on, different hues are displayed. In other words, the desired color tone can be realized at the time of lighting even without adding a colored pigment to the key.

In addition, depending on the materials used for the color layers 120, 220, 320, 420, 520, and 620, the color tone of the integrated EL keypad when the light emitting elements 10, 20, 30, 40, 50, and 60 are turned on varies. .

In addition, by using a polyester-based material that is resistant to moisture as the color layers 120, 220, 320, 420, 520, and 620, the reliability of the EL device used as the light emitting device is improved.

Further, the integrated EL keypad according to the first embodiment has a color layer having a thickness of 2 μm to 10 μm without a material layer for attaching a key having a thickness of about 100 μm formed between the key and the light emitting element. The thickness can be reduced by attaching the key. That is, considering that the thickness of the mobile phone is getting thinner, the thickness reduction of the keypad is a very big advantage.

In the embodiment of the present invention, the EL element has a structure in which a transparent electrode layer, a light emitting layer, an insulating layer, a back electrode layer, and a protective layer are sequentially formed on a transparent insulating substrate, but the structure of the EL element used in the integrated EL keypad of the present invention. Is not necessarily limited thereto, and an EL element having various structures can be used.

As described above, according to the present invention, the present invention uses a color layer to change the color tone of the light emitting element, and to maintain the color tone at the time of unlighting of the light emitting element and the color tone at the time of lighting, that is, at the time of non-lighting of the light emitting element. It is possible to provide an integrated EL keypad that maintains a gray-based color tone and implements a color-based color tone when the light emitting device is turned on.

In addition, the present invention can provide an integrated EL keypad having a reduced thickness by directly attaching a key through the color layer.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims (31)

A light emitting element for backlight; A color layer formed on the front surface of the light emitting device; A primer layer formed on the rear surface of the light emitting device; A material layer integrated with the light emitting device through a primer layer on a rear surface of the light emitting device and forming a protrusion; And a plurality of keys attached to a color layer corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 1, And the light emitting element comprises a plurality of EL elements arranged in correspondence with the respective keys with spaces therebetween maintaining a certain distance therebetween in consideration of the click feeling of the integrated EL keypad. The method of claim 2, An integral EL keypad characterized in that a material layer for forming the protrusion surrounds the integrated EL keypad. The method of claim 1, And the color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm. The method of claim 1, The integrated EL keypad characterized in that the material layer for forming the protrusion is made of silicone or synthetic resin. A light emitting element for backlight; A color layer formed on the front surface of the light emitting device; A material layer integrated with the light emitting device through the color layer and for attaching a key; A material layer integrated with the light emitting device through a rear surface of the light emitting device and forming a protrusion; And a plurality of keys attached to a material layer for attaching keys corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 6, And the light emitting element comprises a plurality of EL elements arranged in correspondence with the respective keys with spaces therebetween maintaining a constant distance therebetween in consideration of the click feeling of the integrated EL keypad. The method of claim 7, wherein An integral EL keypad characterized in that a material layer for forming the protrusion surrounds the integrated EL keypad. The method of claim 6, And the color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm. The method of claim 6, The integrated EL keypad characterized in that the material layer for forming the protrusion is made of silicone or synthetic resin. The method of claim 6, The integrated EL keypad, which is integrated with the light emitting element through the color layer, and a material layer for attaching a key is a silicon layer or a synthetic resin layer formed through a molding process. The method of claim 6, The integrated EL keypad characterized in that it is integrated with the light emitting element through the color layer, and the material layer for attaching the key is a silicon film or a synthetic resin film. A light emitting element for backlight; A color layer formed on the front surface of the light emitting device; A first primer layer formed on the color layer; A material layer integrated with the light emitting device through the first primer layer and attaching a key; A second primer layer formed on a rear surface of the light emitting device; A material layer integrated with the light emitting device through the second primer layer and forming a protrusion; And a plurality of keys attached to a material layer for attaching keys corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 13, And the light emitting element comprises a plurality of EL elements arranged in correspondence with the respective keys with spaces therebetween maintaining a constant distance therebetween in consideration of the click feeling of the integrated EL keypad. The method of claim 14, An integral EL keypad characterized in that a material layer for forming the protrusion surrounds the integrated EL keypad. The method of claim 13, And the color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm. The method of claim 13, The integrated EL keypad, which is integrated with the light emitting device through the second primer layer, and the material layer for forming the protrusion is a silicon layer or a synthetic resin layer. The method of claim 13, The integrated EL keypad, which is integrated with the light emitting device through the first primer layer, and the material layer for attaching the key is a silicon layer or a synthetic resin layer. The method of claim 13, The integrated EL keypad, which is integrated with the light emitting element through the first primer layer, and the material layer for attaching the key is a silicon film or a synthetic resin film. In the method of manufacturing an integrated EL keypad used in a portable terminal, Manufacturing a light emitting device for a backlight; Forming a color layer on the entire surface of the light emitting device; Forming a primer layer on a rear surface of the light emitting device; Integrating the light emitting device through a material layer for forming the protrusion and a primer layer on the rear surface of the light emitting device; Cutting the light emitting device and the material layer integrated into a form suitable for the portable terminal in consideration of a click feeling; And attaching a plurality of keys to a color layer corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 20, The light emitting element is composed of a plurality of EL elements arranged corresponding to the key, and after the color layer forming process, a space portion is formed so as to maintain a predetermined interval between the light emitting elements by removing unnecessary portions of the EL element. The manufacturing method of the integrated EL keypad characterized by further performing a cutting process. The method of claim 21, A method of manufacturing an integrated EL keypad, wherein a material layer for forming the protrusions surrounds the integrated EL keypad. The method of claim 20, The color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm. In the method of manufacturing an integrated EL keypad used in a portable terminal, Manufacturing a light emitting device for a backlight; Forming a color layer on the entire surface of the light emitting device; Integrating a material layer for attaching a key with the light emitting element through the color layer; Integrating a material layer for forming a protrusion with the light emitting device through a rear surface of the light emitting device; Cutting the light emitting element integrated into a form suitable for a portable terminal, a material layer for attaching a key, and a material layer for forming a protrusion in view of a feeling of click; And attaching a plurality of keys to a color layer corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 24, The light emitting element is composed of a plurality of EL elements arranged corresponding to the key, and after the step of forming a material layer for attaching a key on the color layer, the unnecessary portion of the EL element is removed to remove the light emitting element. The manufacturing method of the integrated EL keypad characterized in that it further performs a cutting process for forming a space portion so that a predetermined interval is maintained therebetween. The method of claim 25, A method of manufacturing an integrated EL keypad, wherein a material layer for forming the protrusions surrounds the integrated EL keypad. The method of claim 24, The color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm. In the method of manufacturing an integrated EL keypad used in a portable terminal, Manufacturing a light emitting device for a backlight; Forming a color layer on the entire surface of the light emitting device; Forming a first primer layer on the color layer; Integrating a material layer for attaching a key with the light emitting element through the first primer layer; Forming a second primer layer on a rear surface of the light emitting device; Integrating a material layer for forming a protrusion with the light emitting device through the second primer layer; Cutting the light emitting element integrated into a form suitable for a portable terminal, a material layer for attaching a key, and a material layer for forming a protrusion in view of a feeling of click; And attaching a plurality of keys to a color layer corresponding to the light emitting surface of the front surface of the light emitting element. The method of claim 28, The light emitting element is composed of a plurality of EL elements arranged corresponding to the key, and after the step of forming a material layer for attaching a key on the color layer, the unnecessary portion of the EL element is removed to remove the light emitting element. The manufacturing method of the integrated EL keypad characterized in that it performs a cutting process which forms a space part so that a predetermined space | interval is maintained between. The method of claim 29, A method of manufacturing an integrated EL keypad, wherein a material layer for forming the protrusions surrounds the integrated EL keypad. The method of claim 28, The color layer is formed on the front surface of the EL element corresponding to each key, and has a thickness of 2 µm to 10 µm.